C Specification
The VkOpacityMicromapSpecialIndexEXT enumeration is defined as:
// Provided by VK_EXT_opacity_micromap
typedef enum VkOpacityMicromapSpecialIndexEXT {
VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_TRANSPARENT_EXT = -1,
VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_OPAQUE_EXT = -2,
VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_UNKNOWN_TRANSPARENT_EXT = -3,
VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_UNKNOWN_OPAQUE_EXT = -4,
// Provided by VK_EXT_opacity_micromap with VK_NV_cluster_acceleration_structure
VK_OPACITY_MICROMAP_SPECIAL_INDEX_CLUSTER_GEOMETRY_DISABLE_OPACITY_MICROMAP_NV = -5,
} VkOpacityMicromapSpecialIndexEXT;Description
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VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_TRANSPARENT_EXT specifies that the entire triangle is fully transparent.
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VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_OPAQUE_EXT specifies that the entire triangle is fully opaque.
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VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_UNKNOWN_TRANSPARENT_EXT specifies that the entire triangle is unknown-transparent.
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VK_OPACITY_MICROMAP_SPECIAL_INDEX_FULLY_UNKNOWN_OPAQUE_EXT specifies that the entire triangle is unknown-opaque.
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VK_OPACITY_MICROMAP_SPECIAL_INDEX_CLUSTER_GEOMETRY_DISABLE_OPACITY_MICROMAP_NV specifies that Opacity Micromap will be disabled for this triangle and opacity value will be picked from VkClusterAccelerationStructureBuildTriangleClusterInfoNV::
baseGeometryIndexAndGeometryFlagsinstead. Note that this special index is only valid for Cluster Geometry.
Document Notes
For more information, see the Vulkan Specification.
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.